Dorch DS15 HPFP Upgrade - BMW N55

QT Parts is a Finnish online store.

Our warehouse is located in Nokia, Finland.

You can collect your order directly from us if needed. Simply select “Pickup” at checkout.

Pay securely with multiple payment methods, including invoice and installment plans through Klarna.

The delivery time for products in stock is 1-5 business days. We ship worldwide.

If the product is not in stock and it is a pre order product, the average delivery time is 5-21 business days. If the product has a longer delivery time than previously announced, we will be in touch. International orders may be subject to VAT, import duties, and customs fees upon arrival in the destination country.

Terms for product returns:

• You must return the ordered products within 14 days of receiving
• The products must be unused and without damages
• Commission fee for handling returns is 21,90€
• For product returns, the customer is in charge of the return costs. Only door to door service (Express)
• Shipping costs are not refunded

For international orders sales are final and non-refundable. Once an order is placed, it cannot be canceled or returned. By placing an order, you acknowledge and agree to these terms.

Return address: QT Parts, Vasarakatu 8B, 37150 Nokia, Finland.

Pre order / made-to-order products

If the product you have ordered is a pre order or made-to-order item, it is not subject to the 14-day right of withdrawal or return under consumer protection laws, as the product is manufactured or sourced specifically based on the customer’s individual order.

If you wish to cancel your order before receiving the product, we will refund 50% of the total order amount.

This condition applies to the following product categories:

• Suspension
• Engine Tuning
• Engine Parts
• Exhaust Systems
• Fueling
• Turbochargers/superchargers
• Drivetrain
• ECE-approved Downpipes

All of the above products are manufactured or sourced individually based on the customer’s order, and therefore cannot be returned after delivery, unless the product has a manufacturing or material defect.

In the event of such a defect, the standard liability for defects as provided by consumer protection legislation shall apply.

Dorch DS15 HPFP Upgrade | BMW N55

Dorch Engineering introduces a new generation of high-pressure fuel pumps for BMW N55 engines. The previously known "Dorch Stage 1" (DS1) has been replaced by the completely redesigned DS15 model – a so-called Stage 1.5 level. This pump has been re-engineered from the ground up for maximum performance, reliability, and ease of installation.

Technical Specifications (DS15-250)

• Performance improvement: up to +38–49% (N55LK)
• Maximum flow (gasoline): 550–750 whp
• Maximum flow (E85): 400–610 whp
• Operating pressure: up to 250 bar

Key Features

• Completely Redesigned Structure: Improved pressure chamber, suspension, piston stroke, and optimized volumetric efficiency
• Improved Installability: New external design facilitates hose routing
• 250 bar Capacity: Enables significantly higher fuel flow, especially in tuned engines

Plug & Play Installation

The DS15 is a complete plug-and-play solution that installs directly in place of the original pump without modifications:

• No cutting, bending, or crimping
• Full compatibility with the car's original DME control
• Retains all OEM safety and control features

Note: The pump requires a software update. With MHD or Bootmod3 software, simply select the pump during flashing. Otherwise, the .BIN file must be sent to the appropriate developer.

Package Contents

• Dorch HPFP pump + mounting hardware
• High-pressure fuel line
• Low-pressure hose
• Low-pressure hose clamp
• Plug & Play adapter wire
• Lifetime warranty

Compatibility

Fits various BMW N55 models, including:

• F87 M2
• F20/21 135i / 135xi
• F22/23 235i / 235xi
• F30/31/34 335i / 335xi
• F32/33/36 435i / 435xi
• F10/11 535i / 535xi*
• F25/26 X3/X4 35i*
• F15/16 X5/X6 35i
• E-series models (135i, 335i, X1, X5, X6)*

* Only 2013+ models with original Bosch HPFP

❌ Not compatible with 2011–2012 N55 engines